Newhall Pass, Mountain pass in Los Angeles County, California.

Newhall Pass is a mountain pass in Los Angeles County that forms a natural gap between the Santa Susana Mountains and San Gabriel Mountains. This passage accommodates multiple transportation routes including Interstate 5, California State Route 14, Metrolink rail services, and the Union Pacific Railroad.

Gaspar de Portolá's expedition passed through the gap in August 1769, but the pass was not named for him. It was first called Fremont Pass for John C. Frémont, thought to have crossed in 1847, though he actually took the El Camino Viejo slightly east. In 1853 Henry Clay Wiley installed a windlass on the steep Santa Clara Divide and built a tavern, hotel and stable; Sanford and Cyrus Lyon bought him out in 1854, giving the name Lyons Station. The name Newhall honors Henry Newhall, whose Rancho San Francisco landholdings underpin Santa Clarita.

The pass is named after businessman Henry Newhall and serves as a vital link connecting the San Fernando Valley to the Santa Clarita Valley. Today it functions as a busy modern transportation corridor where residents and travelers move between different regions of Los Angeles County.

Visit during off-peak hours to avoid heavy traffic and enjoy clearer views of the mountain landscape. Keep in mind that this is primarily a functioning transportation hub, so pedestrian access is limited throughout the area.

Beale's Cut, a slot road dug through San Fernando Mountain, was deepened to 90 feet (27.4 m) and served traffic until the Newhall Tunnel opened in 1910. It appeared in silent westerns, including John Ford's films from 1917 on; in Three Jumps Ahead (1923) Tom Mix was filmed jumping it. Partly collapsed in the 1994 Northridge earthquake, it is now about 30 feet deep, fenced off between Sierra Highway and the freeway.